JPWO2020054842A1 - Vertical sealing device - Google Patents

Vertical sealing device Download PDF

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JPWO2020054842A1
JPWO2020054842A1 JP2020546220A JP2020546220A JPWO2020054842A1 JP WO2020054842 A1 JPWO2020054842 A1 JP WO2020054842A1 JP 2020546220 A JP2020546220 A JP 2020546220A JP 2020546220 A JP2020546220 A JP 2020546220A JP WO2020054842 A1 JPWO2020054842 A1 JP WO2020054842A1
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annular
sealing device
annular recess
hanging piece
machine
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JP7309295B2 (en
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雅和 喜藤
雅和 喜藤
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EagleBurgmann Japan Co Ltd
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EagleBurgmann Japan Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/441—Free-space packings with floating ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4476—Labyrinth packings with radial path
    • F16J15/4478—Pre-assembled packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/54—Other sealings for rotating shafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Abstract

機外からシール部への異物の侵入を防ぐことができる縦型シール装置を提供する。
上下方向に延びる回転軸２を軸封するシール部Ｓを有する縦型シール装置１であって、シール部Ｓよりも機外側には、回転側要素３と静止側要素６との径方向の隙間Ｇ２よりも外径方向に延びる環状鍔部５ａが回転側要素３に設けられている。Provided is a vertical sealing device capable of preventing foreign matter from entering the sealing portion from outside the machine.
A vertical sealing device 1 having a sealing portion S for axially sealing the rotating shaft 2 extending in the vertical direction, and a radial gap between the rotating side element 3 and the stationary side element 6 on the outer side of the machine than the sealing portion S. An annular flange portion 5a extending in the outer radial direction from G2 is provided on the rotating side element 3.

Description

本発明は、上下方向に延びる回転軸を軸封する縦型シール装置に関する。 The present invention relates to a vertical sealing device for axially sealing a rotating shaft extending in the vertical direction.

ポンプや攪拌機等は、回転軸から伝達される駆動力を用いて動作しており、縦型シール装置は、上下方向に延びる回転軸を軸封することにより機内から機外へまたは機外から機内への流体の漏れを防いでいる。 Pumps, stirrers, etc. operate using the driving force transmitted from the rotating shaft, and the vertical sealing device works by sealing the rotating shaft extending in the vertical direction from the inside of the machine to the outside of the machine or from the outside of the machine to the inside of the machine. Prevents fluid from leaking to.

このような縦型シール装置として、例えば特許文献１に示されるメカニカルシール（シール装置）は、上下方向に延びる攪拌機の回転軸を軸封するために使用される縦型のメカニカルシールであり、機器ハウジングに取り付けられたシールケースと、シールケースに保持されたホルダと、シールケースとホルダとの間に配置されたスプリングと、ホルダを介してシールケースに固定された静止密封環と、回転軸にスリーブを介して固定され静止密封環に対して相対回転可能な回転密封環と、から主に構成されており、静止密封環および回転密封環の上下に対向する密封端面同士を密接摺動させてシール部を形成することにより、被密流体が配置される機内領域と大気側の機外領域とを遮蔽している。 As such a vertical sealing device, for example, the mechanical sealing (sealing device) shown in Patent Document 1 is a vertical mechanical sealing used for shaft-sealing the rotation axis of a stirrer extending in the vertical direction, and is an apparatus. A seal case attached to the housing, a holder held in the seal case, a spring arranged between the seal case and the holder, a static sealing ring fixed to the seal case via the holder, and a rotating shaft. It is mainly composed of a rotary sealing ring that is fixed via a sleeve and can rotate relative to the static sealing ring, and the static sealing ring and the vertically facing sealed end faces of the rotary sealing ring are closely slid with each other. By forming the seal portion, the in-flight area where the contaminated fluid is arranged and the out-of-machine area on the atmosphere side are shielded.

特開２００９−２４８３６号公報（第５頁、第１図）Japanese Unexamined Patent Publication No. 2009-24836 (Page 5, Fig. 1)

特許文献１のメカニカルシールは、静止密封環および回転密封環の密封端面を密接摺動させてシール部を形成することにより機内領域と機外領域とを遮蔽し、機内領域から機外領域への被密封流体の漏れ、および機外領域から機内領域への大気の侵入を防止することができるものであるが、上下方向に延びる回転軸に適用される縦型シール装置であるため、シール部よりも機外側（上方）において回転軸と共に回転するスリーブ等の回転側要素の外周面と、機器ハウジングに固定されるシールケース、ホルダ、静止密封環等の静止側要素の内周面との間に形成される隙間を通して機外から塵、埃、油滴等の異物がシール部に侵入してしまう虞があった。 The mechanical seal of Patent Document 1 shields the in-machine region and the outside region by closely sliding the sealing end faces of the static sealing ring and the rotating sealing ring to form a sealing portion, and from the inside region to the outside region. It is possible to prevent leakage of the fluid to be sealed and intrusion of air from the outside area to the inside area, but since it is a vertical sealing device applied to the rotating shaft extending in the vertical direction, it is possible to prevent it from the sealing part. Between the outer peripheral surface of the rotating side element such as the sleeve that rotates with the rotating shaft on the outside (upper side) of the machine and the inner peripheral surface of the stationary side element such as the seal case, holder, and static sealing ring fixed to the equipment housing. There is a risk that foreign matter such as dust, dust, and oil droplets may enter the seal portion from outside the machine through the formed gap.

本発明は、このような問題点に着目してなされたもので、機外からシール部への異物の侵入を防ぐことができる縦型シール装置を提供することを目的とする。 The present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a vertical sealing device capable of preventing foreign matter from entering the sealing portion from outside the machine.

前記課題を解決するために、本発明の縦型シール装置は、
上下方向に延びる回転軸を軸封するシール部を有する縦型シール装置であって、
前記シール部よりも機外側には、回転側要素と静止側要素との径方向の隙間よりも外径方向に延びる環状鍔部が前記回転側要素に設けられている。
これによれば、回転側要素と静止側要素との径方向の隙間が環状鍔部により機外側から覆われるため、機外からシール部への異物の侵入を防止することができる。In order to solve the above problems, the vertical sealing device of the present invention is used.
A vertical sealing device having a sealing portion that seals a rotating shaft extending in the vertical direction.
An annular collar portion extending in the outer diameter direction from the radial gap between the rotating side element and the stationary side element is provided on the outer side of the machine from the sealing portion.
According to this, since the radial gap between the rotating side element and the stationary side element is covered from the outside of the machine by the annular collar portion, it is possible to prevent foreign matter from entering the seal portion from the outside of the machine.

好適には、前記環状鍔部から下方に延びる垂片が形成されている。
これによれば、環状鍔部の先端から回り込んで侵入してくる異物を垂片により遮ることができる。Preferably, a hanging piece extending downward from the annular collar portion is formed.
According to this, foreign matter that wraps around from the tip of the annular collar portion and invades can be blocked by the hanging piece.

好適には、前記静止側要素に設けられる環状凹部に前記垂片が挿入され、
前記環状凹部には、機外に開放するように外径方向に延びる貫通孔が形成されている。
これによれば、垂片により遮られた異物が環状凹部内にトラップされるため、シール部まで異物が侵入し難くなるとともに、貫通孔を通して環状凹部内にトラップされた異物を機外に排出できる。Preferably, the sagging piece is inserted into the annular recess provided in the stationary element.
A through hole extending in the outer diameter direction is formed in the annular recess so as to open to the outside of the machine.
According to this, since the foreign matter blocked by the hanging piece is trapped in the annular recess, it is difficult for the foreign matter to enter the seal portion, and the foreign matter trapped in the annular recess can be discharged to the outside of the machine through the through hole. ..

好適には、前記貫通孔は、前記環状凹部から外径方向へ向けて低くなるように傾斜している。
これによれば、貫通孔の傾斜を利用することにより環状凹部から機外に異物が排出されやすい。Preferably, the through hole is inclined so as to be lowered in the outer diameter direction from the annular recess.
According to this, foreign matter is easily discharged to the outside of the machine from the annular recess by utilizing the inclination of the through hole.

好適には、前記垂片は、先端側に拡径部を有し、
前記環状凹部は、内周面が前記拡径部に沿って形成されている。
これによれば、垂片と環状凹部との間の径方向の隙間に侵入した異物が垂片の拡径部に沿って環状凹部の外径側に誘導されるため、貫通孔を通して機外に異物が排出されやすい。Preferably, the sagging piece has a diameter-expanded portion on the tip side.
The inner peripheral surface of the annular recess is formed along the enlarged diameter portion.
According to this, foreign matter that has entered the radial gap between the hanging piece and the annular recess is guided to the outer diameter side of the annular recess along the enlarged diameter portion of the hanging piece, so that the foreign matter is guided to the outside of the machine through the through hole. Foreign matter is easily discharged.

好適には、前記環状鍔部は、前記回転軸に固定されたスリーブに固定部材によって固定されている。
これによれば、環状鍔部および垂片を軸方向に位置決めしやすい。Preferably, the annular collar portion is fixed to the sleeve fixed to the rotating shaft by a fixing member.
According to this, it is easy to position the annular collar portion and the hanging piece in the axial direction.

好適には、前記垂片は、環状に形成されている。
これによれば、環状の垂片により周方向に亘って異物の侵入を防ぐことができる。Preferably, the sagging piece is formed in an annular shape.
According to this, it is possible to prevent the invasion of foreign matter in the circumferential direction by the annular hanging piece.

さらに好適には、前記貫通孔は、前記環状凹部の底面に繋がっている。
これによれば、環状凹部内に侵入した異物を貫通孔内に確実に誘導することができる。More preferably, the through hole is connected to the bottom surface of the annular recess.
According to this, the foreign matter that has entered the annular recess can be reliably guided into the through hole.

さらに好適には、前記環状凹部の内径側の周縁には外径方向に延びる環状突起が形成されている。
これによれば、環状凹部の内径側からシール部に侵入しようとする異物を環状突起により規制することができる。More preferably, an annular protrusion extending in the outer diameter direction is formed on the inner peripheral edge of the annular recess on the inner diameter side.
According to this, foreign matter that tries to enter the seal portion from the inner diameter side of the annular recess can be regulated by the annular protrusion.

さらに好適には、前記静止側要素には、前記貫通孔の機外側の開口を上方から覆うカバーが形成されている。
これによれば、貫通孔を通して機外から環状凹部に異物が侵入することを防止できる。More preferably, the stationary side element is formed with a cover that covers the opening of the through hole on the outside of the machine from above.
According to this, it is possible to prevent foreign matter from entering the annular recess from outside the machine through the through hole.

本発明の実施例１に係る縦型シール装置の構造を示す断面図である。It is sectional drawing which shows the structure of the vertical sealing apparatus which concerns on Example 1 of this invention. 本発明の実施例２に係る縦型シール装置の構造を示す断面図である。It is sectional drawing which shows the structure of the vertical sealing apparatus which concerns on Example 2 of this invention. 本発明の実施例３に係る縦型シール装置の構造を示す断面図である。It is sectional drawing which shows the structure of the vertical sealing apparatus which concerns on Example 3 of this invention.

本発明に係る縦型シール装置を実施するための形態を実施例に基づいて以下に説明する。 A mode for carrying out the vertical sealing device according to the present invention will be described below based on examples.

実施例１に係る縦型シール装置につき、図１を参照して説明する。尚、本実施例においては、紙面左側を機外側、紙面右側を機内側として説明する。 The vertical sealing device according to the first embodiment will be described with reference to FIG. In this embodiment, the left side of the paper surface will be described as the outside of the machine, and the right side of the paper surface will be described as the inside of the machine.

図１に示されるように、本実施例の縦型シール装置１は、ポンプや攪拌機等の回転機械の鉛直方向である上下方向に延びる回転軸２とハウジング３との間に設けられており、回転軸２の外周にＯリング２０を介在させた状態で密封状に固定される回転側要素としてのスリーブ４と、スリーブ４を介して回転軸２に固定される回転側要素としての環状のルーフ部材５と、固定ボルトナット１０によりハウジング３に固定される静止側要素としての第１シールケース６と、固定ボルト１１により第１シールケース６に一体に固定される静止側要素としての第２シールケース７と、第１シールケース６および第２シールケース７の対向端面からそれぞれ上下方向に延びる回転防止部材１２により回り止めされる一対のシールリング８，９（静止側要素）と、から主に構成されている。尚、スリーブ４は、セットスクリュ１６によって回転軸２に相対移動しないように固定されている。また、第１シールケース６は、Ｏリング３０を介在させた状態でハウジング３に密封状に固定され、第２シールケース７は、Ｏリング４０を介在させた状態で第１シールケース６に密封状に固定されている。 As shown in FIG. 1, the vertical sealing device 1 of the present embodiment is provided between the rotating shaft 2 extending in the vertical direction, which is the vertical direction of a rotating machine such as a pump or a stirrer, and the housing 3. A sleeve 4 as a rotating side element fixed in a sealed manner with an O-ring 20 interposed on the outer circumference of the rotating shaft 2, and an annular roof as a rotating side element fixed to the rotating shaft 2 via the sleeve 4. The member 5, the first seal case 6 as a stationary side element fixed to the housing 3 by the fixing bolt nut 10, and the second seal as a stationary side element integrally fixed to the first seal case 6 by the fixing bolt 11. Mainly from the case 7 and a pair of seal rings 8 and 9 (stationary side elements) that are stopped by rotation prevention members 12 extending in the vertical direction from the facing end faces of the first seal case 6 and the second seal case 7, respectively. It is configured. The sleeve 4 is fixed by the set screw 16 so as not to move relative to the rotating shaft 2. Further, the first seal case 6 is hermetically fixed to the housing 3 with the O-ring 30 interposed therebetween, and the second seal case 7 is sealed to the first seal case 6 with the O-ring 40 interposed therebetween. It is fixed in a shape.

次いで、シールリング８，９について説明する。図１に示されるように、シールリング８，９は、第１シールケース６に第２シールケース７が固定されることによりスリーブ４の外周面との間に形成される環状隙間Ｇ１に上下方向に並んで配置されている。また、シールリング８，９は、それぞれ周方向に分割された図示しない分割体を環状に組み合わせたセグメントシールとして構成されている。シールリング８，９の外周面に設けられる周溝にそれぞれ装着される環状のエキステンションスプリング１３を径方向に緊縮させることで、シールリング８，９は内径側（すなわちスリーブ４の外周面側）に向かって付勢されている。シールリング８，９の内周面とスリーブ４の外周面とを密接摺動させることでシール部Ｓが形成されている。また、シールリング８，９は、対向端面間に配置されるコンプレッションスプリング１４により上下方向（すなわち軸方向）に向かってそれぞれ付勢されることにより、第１シールケース６および第２シールケース７に密封状に押し付けられた状態で保持されている。 Next, the seal rings 8 and 9 will be described. As shown in FIG. 1, the seal rings 8 and 9 are vertically oriented in the annular gap G1 formed between the second seal case 7 and the outer peripheral surface of the sleeve 4 by fixing the second seal case 7 to the first seal case 6. They are arranged side by side. Further, the seal rings 8 and 9 are configured as a segment seal in which divided bodies (not shown) divided in the circumferential direction are combined in an annular shape. By contracting the annular extension springs 13 attached to the circumferential grooves provided on the outer peripheral surfaces of the seal rings 8 and 9 in the radial direction, the seal rings 8 and 9 are on the inner diameter side (that is, the outer peripheral surface side of the sleeve 4). Is being urged towards. The seal portion S is formed by closely sliding the inner peripheral surfaces of the seal rings 8 and 9 and the outer peripheral surface of the sleeve 4. Further, the seal rings 8 and 9 are urged in the vertical direction (that is, in the axial direction) by the compression spring 14 arranged between the facing end faces, thereby forming the first seal case 6 and the second seal case 7. It is held in a sealed state.

次いで、第２シールケース７について説明する。図１に示されるように、第２シールケース７は、機外側端面に固定ボルト１１の頭部が収容される座ぐり穴が形成される第１円筒部７ａと、第１円筒部７ａの機内側において第１円筒部７ａよりも内径が大きく形成される第２円筒部７ｂと、第１円筒部７ａの内周面の機内側から内径方向に延びる内向きフランジ部７ｃと、内向きフランジ部７ｃの内径側から上方（すなわち機外側）に延びる環状凸部７ｄとを有する略円筒形状を成し、第２シールケース７の機外側の内径部には、第１円筒部７ａの内周面と、内向きフランジ部７ｃの機外側端面と、環状凸部７ｄの外周面により上方に開放する環状凹部７ｅが形成されている。尚、シールリング８，９が配置される環状隙間Ｇ１は、第２シールケース７の第２円筒部７ｂの内径側に形成されることから、環状凹部７ｅは、環状隙間Ｇ１よりも機外側、すなわちシール部Ｓよりも機外側の位置に形成されている。 Next, the second seal case 7 will be described. As shown in FIG. 1, the second seal case 7 is a machine having a first cylindrical portion 7a and a first cylindrical portion 7a in which a counterbore for accommodating the head of the fixing bolt 11 is formed on the outer end surface of the machine. A second cylindrical portion 7b having an inner diameter larger than that of the first cylindrical portion 7a on the inside, an inward flange portion 7c extending in the inner diameter direction from the inner peripheral surface of the inner peripheral surface of the first cylindrical portion 7a, and an inward flange portion. It has a substantially cylindrical shape having an annular convex portion 7d extending upward (that is, outside the machine) from the inner diameter side of 7c, and the inner diameter portion on the outside of the machine of the second seal case 7 has an inner peripheral surface of the first cylindrical portion 7a. An annular recess 7e that opens upward by the outer end surface of the inward flange portion 7c and the outer peripheral surface of the annular convex portion 7d is formed. Since the annular gap G1 in which the seal rings 8 and 9 are arranged is formed on the inner diameter side of the second cylindrical portion 7b of the second seal case 7, the annular recess 7e is located outside the machine than the annular gap G1. That is, it is formed at a position outside the machine from the seal portion S.

また、第２シールケース７には、環状凹部７ｅから機外に開放するように外径方向に延びる貫通孔７ｆが形成されている。貫通孔７ｆは、環状凹部７ｅ側の開口が底面（すなわち内向きフランジ部７ｃの機外側端面）から外径側の側面（すなわち第１円筒部７ａの内周面）にかけて形成されている。また、貫通孔７ｆは、環状凹部７ｅの底面から外径方向へ向けて低くなるように下方に向けて傾斜しており、機外側の開口下端が環状凹部７ｅの底面よりも下方の位置に形成されている。 Further, the second seal case 7 is formed with a through hole 7f extending in the outer diameter direction so as to open from the annular recess 7e to the outside of the machine. The through hole 7f is formed so that the opening on the annular recess 7e side extends from the bottom surface (that is, the outer end surface of the inward flange portion 7c) to the side surface on the outer diameter side (that is, the inner peripheral surface of the first cylindrical portion 7a). Further, the through hole 7f is inclined downward from the bottom surface of the annular recess 7e so as to be lower in the outer diameter direction, and the lower end of the opening on the outside of the machine is formed at a position below the bottom surface of the annular recess 7e. Has been done.

次いで、ルーフ部材５について説明する。図１に示されるように、ルーフ部材５は、スリーブ４の外周面と第２シールケース７の環状凸部７ｄの内周面との径方向の隙間Ｇ２よりも外径方向に延びる環状鍔部５ａと、環状鍔部５ａの先端から下方に延びる環状（言い換えると円筒板状）の垂片５ｂとから構成され、垂片５ｂの先端部が第２シールケース７に形成される環状凹部７ｅ内に挿入されている。垂片５ｂは、環状凹部７ｅや環状凸部７ｄの軸方向略中央の位置まで挿入されており、垂片５ｂの下端５ｃは、貫通孔７ｆの環状凹部７ｅ側の開口上端よりも下方に配置されている。尚、ルーフ部材５は、スリーブ４の機外側端部に外嵌された状態で径方向に螺挿される固定部材としてのセットスクリュ１５によってスリーブ４の外周面に相対移動しないように固定されているため、環状凹部７ｅ内における垂片５ｂの下端５ｃを軸方向に位置決めしやすい。 Next, the roof member 5 will be described. As shown in FIG. 1, the roof member 5 has an annular flange portion extending in the outer diameter direction from the radial gap G2 between the outer peripheral surface of the sleeve 4 and the inner peripheral surface of the annular convex portion 7d of the second seal case 7. Inside the annular recess 7e, which is composed of 5a and an annular (in other words, cylindrical plate-shaped) hanging piece 5b extending downward from the tip of the annular flange portion 5a, and the tip of the hanging piece 5b is formed in the second seal case 7. It is inserted in. The hanging piece 5b is inserted to a position substantially central in the axial direction of the annular recess 7e and the annular convex portion 7d, and the lower end 5c of the hanging piece 5b is arranged below the upper end of the opening on the annular recess 7e side of the through hole 7f. Has been done. The roof member 5 is fixed to the outer peripheral surface of the sleeve 4 by a set screw 15 as a fixing member that is screwed in the radial direction while being fitted onto the outer end of the sleeve 4 so as not to move relative to the outer peripheral surface of the sleeve 4. Therefore, it is easy to position the lower end 5c of the hanging piece 5b in the annular recess 7e in the axial direction.

これによれば、本実施例の縦型シール装置１は、スリーブ４の外周面と第２シールケース７の内周面との径方向の隙間Ｇ２がルーフ部材５の環状鍔部５ａにより機外側（すなわち上方）から覆われるため、機外からシール部Ｓへの異物の侵入を防止することができる。また、環状鍔部５ａの先端から下方に延びる環状の垂片５ｂにより、環状鍔部５ａの先端から回り込んで侵入してくる異物を周方向に亘って遮ることができる。尚、垂片５ｂの外周面と第２シールケース７の第１円筒部７ａの内周面との間の径方向の隙間Ｇ２に侵入してくる異物は、垂片５ｂの外周面に沿って下方に誘導される。 According to this, in the vertical sealing device 1 of the present embodiment, the radial gap G2 between the outer peripheral surface of the sleeve 4 and the inner peripheral surface of the second sealing case 7 is formed on the outer side of the machine by the annular flange portion 5a of the roof member 5. Since it is covered from (that is, above), it is possible to prevent foreign matter from entering the seal portion S from outside the machine. Further, the annular hanging piece 5b extending downward from the tip of the annular flange portion 5a can block foreign matter wrapping around from the tip of the annular flange portion 5a and invading in the circumferential direction. Foreign matter entering the radial gap G2 between the outer peripheral surface of the hanging piece 5b and the inner peripheral surface of the first cylindrical portion 7a of the second seal case 7 is along the outer peripheral surface of the hanging piece 5b. Guided downwards.

また、垂片５ｂの先端部は、第２シールケース７に設けられる環状凹部７ｅ内に挿入されており、垂片５ｂの外周面に沿って下方に誘導された異物は環状凹部７ｅ内にトラップされるため、シール部Ｓまで異物が侵入し難くなっている。さらに、環状凹部７ｅには、機外に開放するように外径方向に延びる貫通孔７ｆが形成されているため、貫通孔７ｆを通して環状凹部７ｅ内にトラップされた異物を機外に排出することができる。 Further, the tip of the hanging piece 5b is inserted into the annular recess 7e provided in the second seal case 7, and the foreign matter guided downward along the outer peripheral surface of the hanging piece 5b is trapped in the annular recess 7e. Therefore, it is difficult for foreign matter to enter the seal portion S. Further, since the annular recess 7e is formed with a through hole 7f extending in the outer diameter direction so as to open to the outside of the machine, foreign matter trapped in the annular recess 7e is discharged to the outside through the through hole 7f. Can be done.

また、貫通孔７ｆの環状凹部７ｅ側の開口は、環状凹部７ｅの底面に繋がっているため、環状凹部７ｅ内に侵入した異物を貫通孔７ｆ内に確実に誘導することができる。また、垂片５ｂの下端５ｃは、貫通孔７ｆの環状凹部７ｅ側の開口上端よりも下方に配置されているため、垂片５ｂの外周面に沿って下方に移動してきた異物が貫通孔７ｆ内に誘導されやすくなっている。 Further, since the opening of the through hole 7f on the annular recess 7e side is connected to the bottom surface of the annular recess 7e, foreign matter that has entered the annular recess 7e can be reliably guided into the through hole 7f. Further, since the lower end 5c of the hanging piece 5b is arranged below the upper end of the opening on the annular recess 7e side of the through hole 7f, foreign matter that has moved downward along the outer peripheral surface of the hanging piece 5b is arranged in the through hole 7f. It is easy to be guided inside.

また、貫通孔７ｆは、環状凹部７ｅの底面から外径方向へ向けて低くなるように傾斜しており、貫通孔７ｆの傾斜を利用することにより、環状凹部７ｅから機外に異物が排出されやすくなっている。尚、貫通孔７ｆは、下方に傾斜していなくてもよい。また、貫通孔７ｆの機外側の開口から吸引することにより貫通孔７ｆを通して異物を積極的に排出するように構成されてもよい。 Further, the through hole 7f is inclined so as to be lowered from the bottom surface of the annular recess 7e toward the outer diameter direction, and by utilizing the inclination of the through hole 7f, foreign matter is discharged from the annular recess 7e to the outside of the machine. It's getting easier. The through hole 7f does not have to be inclined downward. Further, foreign matter may be positively discharged through the through hole 7f by sucking from the opening on the outside of the machine.

また、環状鍔部５ａおよび垂片５ｂを有するルーフ部材５は、回転軸２と共に回転する回転側要素であるため、ルーフ部材５が回転することにより、環状鍔部５ａの上面や垂片５ｂの外周面に付着した異物を遠心力で外径方向に吹き飛ばすことができる。このとき、垂片５ｂに付着した異物は、外径方向に吹き飛ばされることにより、第２シールケース７の第１円筒部７ａの内周面に沿って環状凹部７ｅ内に誘導され、貫通孔７ｆから機外に排出されやすくなっている。特に、垂片５ｂの外周面に沿って下端５ｃまで移動してきた異物は、垂片５ｂの下端５ｃから外径方向に吹き飛ばされることにより、貫通孔７ｆの環状凹部７ｅ側の開口に誘導されやすくなっている。このように、縦型シール装置１は、停止時、運転時に係わらず、機外からシール部Ｓへの異物の侵入を防止することができる。 Further, since the roof member 5 having the annular flange portion 5a and the hanging piece 5b is a rotating side element that rotates together with the rotating shaft 2, the rotation of the roof member 5 causes the upper surface of the annular flange portion 5a and the hanging piece 5b to be formed. Foreign matter adhering to the outer peripheral surface can be blown off in the outer diameter direction by centrifugal force. At this time, the foreign matter adhering to the hanging piece 5b is blown off in the outer diameter direction and is guided into the annular recess 7e along the inner peripheral surface of the first cylindrical portion 7a of the second seal case 7, and is guided into the annular recess 7f. It is easy to be discharged from the machine. In particular, the foreign matter that has moved to the lower end 5c along the outer peripheral surface of the hanging piece 5b is easily guided to the opening on the annular recess 7e side of the through hole 7f by being blown off from the lower end 5c of the hanging piece 5b in the outer diameter direction. It has become. In this way, the vertical sealing device 1 can prevent foreign matter from entering the sealing portion S from outside the machine regardless of whether it is stopped or operating.

次に、実施例２に係る縦型シール装置につき、図２を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。 Next, the vertical sealing device according to the second embodiment will be described with reference to FIG. The same components as those shown in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted.

実施例２における縦型シール装置２０１について説明する。図２に示されるように、本実施例において、ルーフ部材２０５は、環状鍔部２０５ａの先端から下方に延びる環状の垂片２０５ｂの先端側に拡径部２０５ｄを有し、第２シールケース２０７の環状凹部２０７ｅは、外径側の側面（すなわち第１円筒部２０７ａの内周面）が垂片２０５ｂの拡径部２０５ｄに沿って形成されている。 The vertical sealing device 201 according to the second embodiment will be described. As shown in FIG. 2, in the present embodiment, the roof member 205 has a diameter-expanded portion 205d on the tip end side of the annular hanging piece 205b extending downward from the tip end of the annular flange portion 205a, and the second seal case 207. The annular recess 207e is formed with a side surface on the outer diameter side (that is, an inner peripheral surface of the first cylindrical portion 207a) along the enlarged diameter portion 205d of the hanging piece 205b.

これによれば、ルーフ部材２０５の垂片２０５ｂと第２シールケース２０７の環状凹部２０７ｅとの間の径方向の隙間に侵入した異物が垂片２０５ｂの拡径部２０５ｄに沿って環状凹部２０７ｅの外径側に誘導されるため、貫通孔２０７ｆを通して異物が機外に排出されやすい。また、垂片２０５ｂの外周面と第２シールケース２０７の第１円筒部２０７ａの内周面との間の径方向の隙間がクランク形状に構成されることにより、侵入した異物が垂片２０５ｂの拡径部２０５ｄの外周面に接触しやすくなり、垂片２０５ｂに沿って異物が下方に誘導されやすい。 According to this, foreign matter that has entered the radial gap between the hanging piece 205b of the roof member 205 and the annular recess 207e of the second seal case 207 enters the annular recess 207e along the enlarged diameter portion 205d of the hanging piece 205b. Since it is guided to the outer diameter side, foreign matter is easily discharged to the outside of the machine through the through hole 207f. Further, since the radial gap between the outer peripheral surface of the hanging piece 205b and the inner peripheral surface of the first cylindrical portion 207a of the second seal case 207 is formed in a crank shape, the invading foreign matter is formed in the hanging piece 205b. It becomes easy to come into contact with the outer peripheral surface of the enlarged diameter portion 205d, and foreign matter is easily guided downward along the hanging piece 205b.

次に、実施例３に係る縦型シール装置につき、図３を参照して説明する。尚、前記実施例に示される構成部分と同一構成部分については同一符号を付して重複する説明を省略する。 Next, the vertical sealing device according to the third embodiment will be described with reference to FIG. The same components as those shown in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted.

実施例３における縦型シール装置３０１について説明する。図３に示されるように、本実施例において、ルーフ部材３０５は、環状鍔部３０５ａの先端から下方に延びる環状の垂片３０５ｂの先端側に拡径部３０５ｄを有し、拡径部３０５ｄが先端に向けて外径方向に傾斜するように形成されている。これによれば、垂片３０５ｂに沿って下方に誘導される異物が垂片３０５ｂの先端に集まりやすく、特に、ルーフ部材３０５の回転により、異物が垂片３０５ｂの先端から外径方向に吹き飛ばされやすくなり、貫通孔３０７ｆを通して異物が機外に排出されやすい。 The vertical sealing device 301 according to the third embodiment will be described. As shown in FIG. 3, in the present embodiment, the roof member 305 has a diameter-expanded portion 305d on the tip end side of the annular hanging piece 305b extending downward from the tip of the annular flange portion 305a, and the diameter-expanded portion 305d It is formed so as to incline in the outer diameter direction toward the tip. According to this, the foreign matter guided downward along the hanging piece 305b tends to collect at the tip of the hanging piece 305b, and in particular, the foreign matter is blown off from the tip of the hanging piece 305b in the outer diameter direction by the rotation of the roof member 305. It becomes easy, and foreign matter is easily discharged to the outside of the machine through the through hole 307f.

第２シールケース３０７は、第１円筒部が別体のカバー部材３７０により構成され、第２シールケース３０７の機外側の内径部には、カバー部材３７０の内周面と、第２シールケース３０７の内向きフランジ部３０７ｃの機外側端面と、第２シールケース３０７の環状凸部３０７ｄの外周面により上方に開放する環状凹部３０７ｅが形成されている。 In the second seal case 307, the first cylindrical portion is composed of a separate cover member 370, and the inner peripheral surface of the cover member 370 and the second seal case 307 are formed on the inner diameter portion on the outer side of the machine of the second seal case 307. An annular recess 307e that opens upward is formed by the outer end surface of the inward flange portion 307c and the outer peripheral surface of the annular convex portion 307d of the second seal case 307.

環状凹部３０７ｅの内径側の周縁、すなわち第２シールケース３０７の環状凸部３０７ｄの外周面には、上端部から外径方向に延びる環状突起３０７ｇが形成されている。これによれば、環状凹部３０７ｅの内径側からシール部Ｓに侵入しようとする異物を環状突起３０７ｇにより規制することができる。 An annular protrusion 307g extending in the outer diameter direction from the upper end is formed on the inner peripheral surface of the annular recess 307e, that is, on the outer peripheral surface of the annular convex portion 307d of the second seal case 307. According to this, the foreign matter that tries to enter the seal portion S from the inner diameter side of the annular recess 307e can be regulated by the annular protrusion 307g.

また、カバー部材３７０の外径部には下方に延びるカバー３７０ａが形成されており、カバー３７０ａは、第２シールケース３０７の外周面から径方向に僅かに離間した状態で、貫通孔３０７ｆの機外側の開口を覆っている。これによれば、カバー３７０ａによって貫通孔３０７ｆを通して機外から環状凹部３０７ｅに異物が侵入することを防止できる。 Further, a cover 370a extending downward is formed in the outer diameter portion of the cover member 370, and the cover 370a is a machine having a through hole 307f in a state of being slightly separated from the outer peripheral surface of the second seal case 307 in the radial direction. It covers the outer opening. According to this, it is possible to prevent foreign matter from entering the annular recess 307e from the outside of the machine through the through hole 307f by the cover 370a.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

例えば、前記実施例では、縦型シール装置のシール部Ｓがセグメントシールにより形成される態様について説明したが、これに限らず、縦型シール装置のシール部は、メカニカルシールやリップシール等の各種シールにより構成されていてもよい。 For example, in the above embodiment, the mode in which the seal portion S of the vertical sealing device is formed by the segment seal has been described, but the present invention is not limited to this, and the sealing portion of the vertical sealing device includes various types such as mechanical seals and lip seals. It may be composed of a seal.

また、実施例１，２の縦型シール装置に対して、実施例３の縦型シール装置の環状突起３０７ｇやカバー部材３７０（すなわちカバー３７０ａ）の構成を適用してもよい。 Further, the configuration of the annular projection 307 g and the cover member 370 (that is, the cover 370a) of the vertical sealing device of the third embodiment may be applied to the vertical sealing devices of the first and second embodiments.

また、ルーフ部材は、スリーブに固定されるものに限らず、回転軸に直接固定されていてもよい。 Further, the roof member is not limited to the one fixed to the sleeve, and may be directly fixed to the rotating shaft.

また、環状鍔部は、ルーフ部材に形成されるものに限らず、例えばスリーブの外周から延出するように一体形成されていてもよい。 Further, the annular flange portion is not limited to the one formed on the roof member, and may be integrally formed so as to extend from the outer periphery of the sleeve, for example.

また、垂片は、環状鍔部の先端に形成されるものに限らず、環状鍔部の先端よりも内径側の位置に形成されていてもよい。また、垂片は、周方向に連続して環状に形成されるものに限らず、周方向に断続的に形成されていてもよい。また、垂片の先端部は、静止側要素に形成される環状凹部に挿入されなくてもよい。 Further, the hanging piece is not limited to the one formed at the tip of the annular collar portion, and may be formed at a position on the inner diameter side of the tip of the annular collar portion. Further, the hanging pieces are not limited to those formed continuously in the circumferential direction in an annular shape, and may be formed intermittently in the circumferential direction. Further, the tip portion of the hanging piece does not have to be inserted into the annular recess formed in the stationary side element.

また、環状鍔部には、垂片が形成されなくてもよく、環状鍔部の先端側が下方に屈曲していてもよい。 Further, a hanging piece may not be formed on the annular collar portion, and the tip end side of the annular collar portion may be bent downward.

また、環状凹部と機外とを連通する貫通孔は、形成されなくてもよい。 Further, the through hole for communicating the annular recess and the outside of the machine does not have to be formed.

また、ルーフ部材、第１シールケース、第２シールケース、カバー部材は、環状に構成されるものに限らず、周方向に分割された分割体を環状に組み合わせることにより構成されてもよい。 Further, the roof member, the first seal case, the second seal case, and the cover member are not limited to those configured in an annular shape, and may be configured by combining the divided bodies divided in the circumferential direction in an annular shape.

１ 縦型シール装置
２ 回転軸
３ ハウジング
４ スリーブ（回転側要素）
５ ルーフ部材（回転側要素）
５ａ 環状鍔部（回転側要素）
５ｂ 垂片（回転側要素）
６ 第１シールケース（静止側要素）
７ 第２シールケース（静止側要素）
７ａ 第１円筒部
７ｂ 第２円筒部
７ｃ 内向きフランジ部
７ｄ 環状凸部
７ｅ 環状凹部
７ｆ 貫通孔
８，９ シールリング（静止側要素）
１５ セットスクリュ（固定部材）
２０５ ルーフ部材（回転側要素）
２０５ａ 環状鍔部（回転側要素）
２０５ｂ 垂片（回転側要素）
２０５ｄ 拡径部（回転側要素）
２０７ 第２シールケース（静止側要素）
３０５ ルーフ部材（回転側要素）
３０５ａ 環状鍔部（回転側要素）
３０５ｂ 垂片（回転側要素）
３０５ｄ 拡径部（回転側要素）
３０７ 第２シールケース（静止側要素）
３０７ｇ 環状突起
３７０ カバー部材（静止側要素）
３７０ａ カバー
Ｇ１ 環状隙間
Ｇ２ 隙間
Ｓ シール部1 Vertical sealing device 2 Rotating shaft 3 Housing 4 Sleeve (rotating side element)
5 Roof member (rotating side element)
5a Circular collar (rotating side element)
5b hanging piece (rotating side element)
6 First seal case (stationary side element)
7 Second seal case (stationary side element)
7a 1st cylindrical part 7b 2nd cylindrical part 7c Inward flange part 7d Ring convex part 7e Ring recess 7f Through hole 8, 9 Seal ring (stationary side element)
15 set screw (fixing member)
205 Roof member (rotating side element)
205a Circular collar (rotating side element)
205b Drop piece (rotating side element)
205d Enlarged diameter part (rotating side element)
207 Second seal case (stationary side element)
305 Roof member (rotating side element)
305a Circular collar (rotating side element)
305b hanging piece (rotating side element)
305d Enlarged diameter part (rotating side element)
307 Second seal case (stationary side element)
307g annular protrusion 370 cover member (stationary side element)
370a Cover G1 Circular gap G2 Gap S Seal

Claims (7)

上下方向に延びる回転軸を軸封するシール部を有する縦型シール装置であって、
前記シール部よりも機外側には、回転側要素と静止側要素との径方向の隙間よりも外径方向に延びる環状鍔部が前記回転側要素に設けられていることを特徴とする縦型シール装置。A vertical sealing device having a sealing portion that seals a rotating shaft extending in the vertical direction.
A vertical type characterized in that an annular flange portion extending in the outer radial direction from the radial gap between the rotating side element and the stationary side element is provided on the rotating side element on the outer side of the sealing portion. Sealing device. 前記環状鍔部から下方に延びる垂片が形成されている請求項１に記載の縦型シール装置。 The vertical sealing device according to claim 1, wherein a hanging piece extending downward from the annular collar portion is formed. 前記静止側要素に設けられる環状凹部に前記垂片が挿入され、
前記環状凹部には、機外に開放するように外径方向に延びる貫通孔が形成されている請求項２に記載の縦型シール装置。The sagging piece is inserted into the annular recess provided in the stationary side element, and the sagging piece is inserted.
The vertical sealing device according to claim 2, wherein a through hole extending in the outer diameter direction is formed in the annular recess so as to open to the outside of the machine. 前記貫通孔は、前記環状凹部から外径方向へ向けて低くなるように傾斜している請求項３に記載の縦型シール装置。 The vertical sealing device according to claim 3, wherein the through hole is inclined so as to be lowered from the annular recess in the outer diameter direction. 前記垂片は、先端側に拡径部を有し、
前記環状凹部は、内周面が前記拡径部に沿って形成されている請求項３または４に記載の縦型シール装置。The hanging piece has a diameter-expanded portion on the tip side, and has an enlarged diameter portion.
The vertical sealing device according to claim 3 or 4, wherein the annular recess has an inner peripheral surface formed along the enlarged diameter portion. 前記環状鍔部は、前記回転軸に固定されたスリーブに固定部材によって固定されている請求項１ないし５のいずれかに記載の縦型シール装置。 The vertical sealing device according to any one of claims 1 to 5, wherein the annular collar portion is fixed to a sleeve fixed to the rotating shaft by a fixing member. 前記垂片は、環状に形成されている請求項２ないし５のいずれかに記載の縦型シール装置。 The vertical sealing device according to any one of claims 2 to 5, wherein the hanging piece is formed in an annular shape.
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